fix: add windowsHide:true to remaining spawn/exec calls to prevent CMD flash on Windows

Previous fixes in #6813 and subsequent PRs added windowsHide:true to most
spawn sites, but several call sites were missed or regressed:

- SDK server.ts (v1 + v2): kilo serve and TUI spawn
- ts-check.ts: Bun.spawn for tsc invocation
- github.ts: exec for browser open
- desktop-electron cli.ts: install script spawn and version check
- desktop-electron ipc.ts: open-path execFile
- desktop-electron apps.ts: wsl/where execFileSync calls

Without windowsHide:true, each of these subprocess invocations causes a
visible cmd.exe console window to briefly flash on Windows.

Closes #7896

packages/desktop-electron/src/main/apps.ts

@@ -21,11 +21,11 @@ export function wslPath(path: string, mode: "windows" | "linux" | null): string
     if (path.startsWith("~")) {
       const suffix = path.slice(1)
       const cmd = `wslpath ${flag} \"$HOME${suffix.replace(/\"/g, '\\"')}\"`
-      const output = execFileSync("wsl", ["-e", "sh", "-lc", cmd])
+      const output = execFileSync("wsl", ["-e", "sh", "-lc", cmd], { windowsHide: true })
       return output.toString().trim()
     }
 
-    const output = execFileSync("wsl", ["-e", "wslpath", flag, path])
+    const output = execFileSync("wsl", ["-e", "wslpath", flag, path], { windowsHide: true })
     return output.toString().trim()
   } catch (error) {
     throw new Error(`Failed to run wslpath: ${String(error)}`)
@@ -51,7 +51,7 @@ function checkMacosApp(appName: string) {
 function resolveWindowsAppPath(appName: string): string | null {
   let output: string
   try {
-    output = execFileSync("where", [appName]).toString()
+    output = execFileSync("where", [appName], { windowsHide: true }).toString()
   } catch {
     return null
   }

packages/desktop-electron/src/main/cli.ts

@@ -84,7 +84,7 @@ export async function installCli(): Promise<string> {
   writeFileSync(tempScript, script, "utf8")
   chmodSync(tempScript, 0o755)
 
-  const cmd = spawn(tempScript, ["--binary", sidecar], { stdio: "pipe" })
+  const cmd = spawn(tempScript, ["--binary", sidecar], { stdio: "pipe", windowsHide: true })
   return await new Promise<string>((resolve, reject) => {
     cmd.on("exit", (code: number | null) => {
       try {
@@ -107,7 +107,7 @@ export function syncCli() {
 
   let version = ""
   try {
-    version = execFileSync(installPath, ["--version"]).toString().trim()
+    version = execFileSync(installPath, ["--version"], { windowsHide: true }).toString().trim()
   } catch {
     return
   }

packages/desktop-electron/src/main/ipc.ts

@@ -123,7 +123,7 @@ export function registerIpcHandlers(deps: Deps) {
     await new Promise<void>((resolve, reject) => {
       const [cmd, args] =
         process.platform === "darwin" ? (["open", ["-a", app, path]] as const) : ([app, [path]] as const)
-      execFile(cmd, args, (err) => (err ? reject(err) : resolve()))
+      execFile(cmd, args, { windowsHide: true }, (err) => (err ? reject(err) : resolve()))
     })
   })
 

packages/opencode/src/cli/cmd/github.ts

@@ -330,7 +330,7 @@ export const GithubInstallCommand = cmd({
                   ? `start "" "${url}"`
                   : `xdg-open "${url}"`
 
-            exec(command, (error) => {
+            exec(command, { windowsHide: true }, (error) => {
               if (error) {
                 prompts.log.warn(`Could not open browser. Please visit: ${url}`)
               }

packages/opencode/src/kilocode/ts-check.ts

@@ -29,6 +29,7 @@ export namespace TsCheck {
       cwd: root,
       stdout: "pipe",
       stderr: "pipe",
+      windowsHide: true,
       env: { ...process.env },
     })
 

packages/sdk/js/src/server.ts

@@ -68,6 +68,7 @@ export async function createKiloServer(options?: ServerOptions) {
   const proc = spawn(`kilo`, args, {
     // kilocode_change end
     signal: options.signal,
+    windowsHide: true,
     env: {
       ...process.env,
       KILO_CONFIG_CONTENT: buildConfigEnv(options.config), // kilocode_change
@@ -148,6 +149,7 @@ export function createKiloTui(options?: TuiOptions) {
     // kilocode_change end
     signal: options?.signal,
     stdio: "inherit",
+    windowsHide: true,
     env: {
       ...process.env,
       KILO_CONFIG_CONTENT: buildConfigEnv(options?.config), // kilocode_change

packages/sdk/js/src/v2/server.ts

@@ -68,6 +68,7 @@ export async function createKiloServer(options?: ServerOptions) {
   const proc = spawn(`kilo`, args, {
     // kilocode_change end
     signal: options.signal,
+    windowsHide: true,
     env: {
       ...process.env,
       KILO_CONFIG_CONTENT: buildConfigEnv(options.config), // kilocode_change
@@ -148,6 +149,7 @@ export function createKiloTui(options?: TuiOptions) {
     // kilocode_change end
     signal: options?.signal,
     stdio: "inherit",
+    windowsHide: true,
     env: {
       ...process.env,
       KILO_CONFIG_CONTENT: buildConfigEnv(options?.config), // kilocode_change